Valve.



C. WILSON.

VALVE. APPLIOATIoN PILEIVJAN. 15. 1909 Patqnted June 8, 1909.

. whereby the part bearing thelusible plug.

UNITED sTAilnsrATuNr currencHRISTIAN. wnsrnr,` or BRooKLINE,MASSACHUSETTS.

VALVE Specification o! Letters Patent.

Ptentedsune s, i909.

application med January 15, 1909. serial No. 472,398

To all 'whom it may concern:

Be it known thatI, CHRISTIAN WILSON, a subject of the King ofDenmark,residing at Brookline, in the county of Norfolk and Commonwealthof Massachusetts, have invented' a new and useful Valve, of-which thefollow-1" ing is a specification.

My invention relates to an improvement in valves for steam boilerswhereby a fusible plug may be used in conjunction therewith in .a mannerwhereby'upon the fusing of the plug the melted material may be expelledthrough the valve allowing thesteam to be exhausted so as to relieve theboiler of pressure and announce the deficiency of Water supply when thewater has dropped to al point below the fusible plug; and it is the.`

special object of my valve to aiford a means may be removed and thevalve opening closed automatically, thereupon, thus permitting. theboiler to be filled and the steam to be raised without the necessity ofiirslt in- I serting a new fusible plug.

My invention may be` best understood by reference .to the 'accompanyingdrawing in which- Figure l re rescnts a longitudinal crosssectionthrougthe middle part of my valve attached to the side of a boiler. Fig. 2represents the valve after ythe removalv of the part bearing the fusibleplug.

Referring now more particularly to the drawings, A represents the valvecasing into which is screwed a` part (L having a threaded sleeve al thelend of which has a downward slanting rim ,`a2 (rbpresente'd by thedotted line in Fig. l). This part a is threaded at its other end so'thatit may be screwed into the boiler, B, or into some tube or extension ofthe boiler' in any common manner so that it may project merely throughthe casing, as

shown, or well inwardly according to a coinmon practice of attaching'the nipple of fusible plugs.` The part cis hollow, having a" passage cvarying in dimensions extending' through it. This passage cis firsttapered, to

form the shoulder 1L" which ail'ords a valve' seat against which may-beset the lead plug d which sets in a conoidal socket in the end o f thevalve stem E which is threaded on-the greater part of its exteriorwhereby it may be screwed intothe threaded passage c* ofthe casing A..It is obvious, however, that the valve stem E may itself rest on thevalve seat a3 thus forming a valve?,63 Thepassage c1 is in alinementVwith the passage c thus forming one continuous 1passage sothat thevalve stem E may enter t e passage c after passing through the passagec1 andthe passage c 1s referably so varied `in dimension as" to lit boththe threaded and Unthreaded portion of length and closed only bylt eusib e plug d. 'lhahe stem E is rovided with a circular the stem E whichis tubular boing provided with a passage e extendin throu hout itshandle F, preerab y of a common wire con struction as. shown, set atsome distance .from the end of the stem and fastened securely thereto bbinds the handle. fast on the stern E means of a nut f which securelyagainst a collar f 1 The casing A is provided with a chamber A G adaptedto hold a heavy metal ball valve H normally supported in the elevatedposition shown` in Fig. 1 bythe stern E which travl erses the chamber'G.But when the stem E is removed, as shown in- Fig. 2, this ball` l.and bekept more cool when in` contact with the water. Hence I have made'@cavity d in the plug d whereby the water or'hot steam may enter theplug. f

The operation of my fusible plug valve, which is particularly adaptedfor use on auto. mobiles where a saving of time, water and fuel ismostdesirable, is as follows: the water'ofthe boiler has dropped tothedanger' point below the plug d, so that the steam'mayhave accessthereto, the plug d will be melted and expelled through the pas--4 sagee of the tubular stem E thus allowingthe steam to esca e through thepassage. N ow before the boilbr can be filled and vpressure raised againit is necessary to stop the steam y outlet. This may be done by.nserewing the valve vstem E which, because of the ,position ofthehandle F, maybedone without danger while the steam is still escapingthrough the stem E. Upon the removal los lio

of'theistem E to a point beyond the chamber l G the ball valve I-I Willdrop into its seat c2 and close the exhaust passage.v This operationmaybe'A performed in a fraction of. a minute thus saving much steam andhot Waterswhich, When an ordinary fusible plug exhaust is used, is blownout before the passage can be stopped, since in the case of the ordinaryfusible plug exhaust the nipple 1n which the plug was set cannot beunscrewed may now be started also. i The raising of the Water. in theboiler Will at once permit the stem E, with a fresh plug insertedtherein, to4

be screwed back agalnst the seat e3,"thus restoring to the boiler itssafety applioance, or'- this 'may bedone at ones convenience. 4 It isapparent also that the usel of my device whichefects a saving'of steamand hot Water also saves thereby the expense of .rin u when the boilermust be entirely refille with cold Water. This means asaving. off'abouta gallon of fuel in the lcase of afhigh power steam motorcar.

Having thus fully described my invention what I claim is.-

1. In an apparatus of the character speci- Q fled the com mation of acasing, a, passage through said casing, ajtubular valve' stem removablmounted therein, a fusible plug, in said va ve stem, a valve seat insaid casing and a valve-means fixed on said valve stem .adapted to reston said valve. seat, wherebyv the passage through said casing' may beclosed.

2. nIn an a paratus of the character specified the combination of acasing, a passage through said' casino', a tubular valve stem removablymounted therein, a valve seat in said casing and a fusible plug in-saidstem adapted to close the passage therein and to form a valve to\rest onsaid valve seat.

. 3. l In an a paratus of the charactenspecfied the combination ofaca-sing, a passage throughsaid casing, a. tubular valve stem re-`movably mounted therein, a fusible plug in said stem, a valve means onsaid stem, a chamber in said casing, a valve means in said chambernormally held in an inoperative position by said stem but ada ted tofall 'into an operative position upon t e Aretirement of said stem', andclose the passage through said casing.

4. In a fusible plug valve the combination of a primary removable valveapparatus .hav-

ing an outlet normally closed by fusible metal The boiler must bedrained 4ber normally therein butadapted to open by the fusing of,

said metal, and a secondary valve apparatus adaptedsto close upon theretirement of said primary valve apparatus.

be Wholly removed therefrom and a fusible y I plug normally fixed. inthe end of said valve stem'. 6. In an apparatus of the characterspecified the com mation of a casing, a passage throu h said casing, atubular valve stem rcmova ly mounted therein, a chamber in lsaid casing,a ball valve, a seat for said ball valve which is normally supported insaid chamber in an ino erative position by said stem, and means,w erebysaid ball valve may, in falling, u on the retirement of said stem, beguide toward its seat to close said passage 'in said, chamber, and uponthe insertion of said stem, be assisted to its elevated position.

7. In an a paratus ofthe character specified the com mation of a casing,a passage through said casing, a chamber in said casing, a removablymounted valve stem in said .passage and normally traversing said chamer,a ball valve in said chamber normally held in inoperative suspensionbysaid' stem,

a seat for said ball valve and in'said chamber a memberanithan inclinedsurface adapted to engage said ball valve when falling at the retirementof said stem, and to guide said ball valve toward its seat while alsoadapted to facilitate the elevation of said ball valve upon theinsertion of said stem. Y

,8. 4In an a Vparatus of the character specified the comlbination of acasin a passage throu h said casing, atubular va ve stem rcmovablymounted therein, a fusible plug in said stem and a valve means on saidstem, a seatAfor said valve means a chamber in said casing, said chamberbeing normali traversed by said stem, a ball valve in sai chamheld in aninoperative position of suspension b said stem, aseat forsaid ballvalve, in said c iamber a member with aninclined surface adapted toengage said ball valve when said ball valve falls, at 'the retirement ofsaid stem, and to guide said ball valvel toward its seat while alsoadapted to facilitate thc elevation of said ball valve upon theinsertion of said stem.

9. In a device of the charactcrspecified `a fusible plugr having acavity therein substantially as and for the purposes described.

CHRISTIAN WILSON.

Witnesses: i

DANFORTH W. Comes, WiLLIAM H. SMITH.

